refactor: remove CommonJS ripgrep launcher and spawn binary directly

Replace the ripgrep_launcher.cjs intermediary with direct binary execution.
This simplifies the ripgrep module by spawning the binary directly instead
of going through a Node.js subprocess wrapper. Add platform-specific binary
path resolution to handle both Unix and Windows environments.

cli/scripts/ripgrep_launcher.cjs

@@ -1,33 +0,0 @@
-#!/usr/bin/env node
-
-/**
- * Ripgrep runner - executed as a subprocess to run the native module
- * This file is intentionally written in CommonJS to avoid ESM complexities
- */
-
-const path = require('path');
-
-// Load the native module from unpacked directory
-const modulePath = path.join(__dirname, '..', 'tools', 'unpacked', 'ripgrep.node');
-const ripgrepNative = require(modulePath);
-
-// Get arguments from command line (skip node and script name)
-const args = process.argv.slice(2);
-
-// Parse the JSON-encoded arguments
-let parsedArgs;
-try {
-    parsedArgs = JSON.parse(args[0]);
-} catch (error) {
-    console.error('Failed to parse arguments:', error.message);
-    process.exit(1);
-}
-
-// Run ripgrep
-try {
-    const exitCode = ripgrepNative.ripgrepMain(parsedArgs);
-    process.exit(exitCode);
-} catch (error) {
-    console.error('Ripgrep error:', error.message);
-    process.exit(1);
-}

cli/scripts/unpack-tools.cjs

@@ -57,8 +57,7 @@ function areToolsUnpacked(toolsDir) {
     
     const expectedFiles = [
         path.join(unpackedPath, difftBinary),
-        path.join(unpackedPath, rgBinary),
-        path.join(unpackedPath, 'ripgrep.node')
+        path.join(unpackedPath, rgBinary)
     ];
     
     return expectedFiles.every(file => fs.existsSync(file));
@@ -160,4 +159,4 @@ if (require.main === module) {
             console.error('Error:', error);
             process.exit(1);
         });
-}
+}